Review for SSSci Post-test

A student places 3 drops of an acid on an unknown mineral. The student then observes bubbling in the area that the acid is in contact with the mineral. Which is the best conclusion that the student can make regarding this evidence?

• The mineral is a pure element
• The mineral is chemically reacting with the acid
• The mineral has suddenly dropped in temperature
• The mineral is porous in nature, which is the source of the bubbling

A student predicts that similar ice cubes will melt faster in a microwave than in a pot on the stove. How should their hypothesis be tested?

• Observe and record the time for each ice cube to completely change to a liquid
• Identify and record the temperature of each ice cube before each trial
• Determine the volume of liquid water made by each ice cube
• Measure and compare the volume of the pot and the microwave

The mass of a graduated cylinder is 100.0 grams. The mass of the same graduated cylinder with 40 mL of red liquid is 120 grams. What is the DENSITY of the red liquid? (Use desmos)

• 0.5 g/mL
• 2.0 g/mL
• 40 g/mL
• 20 g/mL

Which classroom experiment demonstrates a chemical change?

• Water in a beaker becomes yellow when yellow food dye is added
• A wooden skewer is pierced through a balloon without popping it
• A white precipitate is formed by mixing silver nitrate and potassium chloride
• Liquid nitrogen quickly freezes to form ice cream

Of the three states of matter (solid, liquid, gas), GAS is the only state that

• Is highly compressible and whose volume can change
• has a definite shape and volume
• has a large mass and volume
• takes the shape of its container

Which of these best describes the particle motion taking place as CO2 gas is exposed to freezing temperatures

• The particles decrease in speed
• The particles move with more force
• The motion of the particles becomes random
• The motion of the particles is unchanged

A student left his skateboard out in the rain. The next day when he tried to ride it, he found that the metal parts had become rusty. Which kind of change happened?

• Physical
• Chemical

Which picture shows matter that can not be broken down by physical means into more simple parts?

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Which is NOT an example of a physical change?

• Souring of milk
• Chopping wood
• Molding clay
• Bending copper wire

Which picture represents the student with the greatest amount of POTENTIAL energy?

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